Insulation resistance tester



FIG. 1 is a front view of an insulation resistance tester showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a perspective view from a view point at the right and above the insulation resistance tester. 

The ornamental design for an insulation resistance tester, as shown and described. 